org.springframework.statemachine.support

Class StateMachineUtils

java.lang.Object

org.springframework.statemachine.support.StateMachineUtils

public abstract class StateMachineUtils
extends java.lang.Object

Various utility methods for state machine.

Author:

Janne Valkealahti

Constructor Summary

Constructors

Constructor and Description
StateMachineUtils()

Method Summary

Modifier and Type	Method and Description
static <S> boolean	containsAtleastOne(java.util.Collection<S> left, java.util.Collection<S> right) Checks if right hand collection has atleast one same item as left hand collection.
static boolean	containsAtleastOneEqualString(java.util.Collection<java.lang.String> left, java.util.Collection<java.lang.String> right)
static boolean	containsAtleastOneEqualString(java.util.Collection<java.lang.String> left, java.lang.String right)
static <S,E> java.lang.Long	getMessageHeaderDoActionTimeout(StateContext<S,E> context) Gets a particular message header from a StateContext and parses it to Long.
static <S,E> boolean	isNormalPseudoState(State<S,E> state) Checks if state is a normal pseudo state, meaning it is a pseudostate and its kind is not initial or end.
static <S,E> boolean	isPseudoState(State<S,E> state, PseudoStateKind kind)
static <S,E> boolean	isSubstate(State<S,E> left, State<S,E> right) Checks if right hand side is a substate of a left hand side.
static <S,E> boolean	isTransientPseudoState(State<S,E> state) Checks if state is a transient pseudo state, meaning it is a pseudostate and its kind indicates that machine will never stay on this state after run to completion has finished.
static java.util.function.Function<? super java.lang.Throwable,reactor.core.publisher.Mono<java.lang.Void>>	resumeErrorToContext() Utility function to stash error into reactor context.
static <S> java.util.Collection<java.lang.String>	toStringCollection(java.util.Collection<S> collection)
static java.util.Collection<java.lang.String>	toStringCollection(java.lang.Object object)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

StateMachineUtils

public StateMachineUtils()

Method Detail

isSubstate

public static <S,E> boolean isSubstate(State<S,E> left,
                                       State<S,E> right)

Checks if right hand side is a substate of a left hand side.

Type Parameters:

S - the type of state

E - the type of event

Parameters:

left - the super state

right - the sub state

Returns:

if sub is child of super

containsAtleastOne

public static <S> boolean containsAtleastOne(java.util.Collection<S> left,
                                             java.util.Collection<S> right)

Checks if right hand collection has atleast one same item as left hand collection.

Type Parameters:

S - the generic type

Parameters:

left - the left collection

right - the right collection

Returns:

true, right contains at least one item from left, false otherwise.

isNormalPseudoState

public static <S,E> boolean isNormalPseudoState(State<S,E> state)

Checks if state is a normal pseudo state, meaning it is a pseudostate and its kind is not initial or end.

Type Parameters:

S - the type of state

E - the type of event

Parameters:

state - the state

Returns:

true, if is normal pseudo state

isTransientPseudoState

public static <S,E> boolean isTransientPseudoState(State<S,E> state)

Checks if state is a transient pseudo state, meaning it is a pseudostate and its kind indicates that machine will never stay on this state after run to completion has finished.

Type Parameters:

S - the type of state

E - the type of event

Parameters:

state - the state

Returns:

true, if is normal pseudo state

isPseudoState

public static <S,E> boolean isPseudoState(State<S,E> state,
                                          PseudoStateKind kind)

toStringCollection

public static <S> java.util.Collection<java.lang.String> toStringCollection(java.util.Collection<S> collection)

toStringCollection

public static java.util.Collection<java.lang.String> toStringCollection(java.lang.Object object)

containsAtleastOneEqualString

public static boolean containsAtleastOneEqualString(java.util.Collection<java.lang.String> left,
                                                    java.lang.String right)

containsAtleastOneEqualString

public static boolean containsAtleastOneEqualString(java.util.Collection<java.lang.String> left,
                                                    java.util.Collection<java.lang.String> right)

getMessageHeaderDoActionTimeout

public static <S,E> java.lang.Long getMessageHeaderDoActionTimeout(StateContext<S,E> context)

Gets a particular message header from a StateContext and parses it to Long. Any error parsing header results NULL.

Type Parameters:

S - the type of state

E - the type of event

Parameters:

context - the state context

Returns:

the header as Long or NULL

resumeErrorToContext

public static java.util.function.Function<? super java.lang.Throwable,reactor.core.publisher.Mono<java.lang.Void>> resumeErrorToContext()

Utility function to stash error into reactor context.

Returns:

mono for completion